Air-brake hose.



C. T. DRIGGS.

AIR lBRAKE HOSE. APPLIOATION FILED is111912 1o, 1909 m T. DBIGGS, OFPENNSYLVANIA.

AIB-BRAKE HOSE.

4 Speciilcation of Letters Patent.

Patented July 12, 1910.

Application led September 10, 1909. Serial No. 517,048.

To all whom it may concern:

Be it known that I, CHARLES T. Dames, a citizennof the United States,residing' at Erie,

in the county of Erie and State of Penn' sylvania, have invented new anduseful Improvementsn Air-Brake Hose, of which the ollowing is aspecification'. v

This invention relates to air-brake hose, and consists in certainimprovements in the construction thereof as will be hereinafter` fullydescribed and pointed out in the claim. The object of the invention isto provide an air brake hose which, when broken, will not set theemergency brakes. It will be understood that when the ordinary -airbrake hose is broken or ruptured, the escape of air is ordinarily sorapid that the brakes are set, often causing dama and loss of life.

The invention is 1 ustrated in the accompanying drawings as follows:

F1 re 1 shows a section of the line 1-1 in Fig. 2; Fig. 2 a. sectionfthe line 2-2 in Fig. 1. l Y

The Adrawing illustrates one section of an air brake hose.

1 marks the fitting by means of which the air `brake hose of twodifferent cars is connected, and 2 the fitting with which the hose isconnected with the train pipe of the car..

The fitting 1 has a screw thread projection 3, and the fitting 2 has ascrew thread rojection 4. The fittings 5 are screw on these projections.The fitting 5 has an upwardl extending projectionVV 6 `forming a shouler 7. An outer hose 8 is arranged over the rojection 6, and extendsbeyo'nd the should) 5 by means of a band 9. The projection has aninternal shoulder 10 and the inner hose 11l extends within theprojection 6 past the shoulderlO, and is secured therein by means of arin 12 which is expanded within the hose. erforations 13 extendlongitudinally through. the projection 6 connecting the space Mbetweenthe hose, with the train air. Y

In normal use the inner hose 11 carries the air of the train line. Thepreure on this inner hose, however, is balanced by reason of the factthatf'the train air` passes through the perforations 13 to the space 14.The outer hose, therefore, is not only subjected to the wear of theelements but also carriesthe train'preure. When the 'outer 4cars, andoften loss of er 7 andis clamped on the ittin `cape of air esca e of airh ose is ruptured, the airof course escapes yfrom the s ace v14 andthrough the perforations 13. he perforations 13 however are of 'such.capacitythat they will not accomplish the setting of the emergencybrakes. They will however ordinarily accomplish the setting of thebrakes. By this construction the inner hose which may be termed thesafety hose, is at all times protected from wear and alsorelieved fromthe strain incident to train pi e pressure. On the other hand Vby havingt e space14 connected with the air, indicatlons are given-Of the ruptureof the outer hose without such disastrous results as follow the rupturnof ordinary train pipe hose inasmuch as t e connecting pressure in the'train pipe as to' set the 'prevent at least any such reduction in thepassages are of such small capacity as' to emergency brakes. v

As indicated, my air brake hose is intended for usein combinationwith-an air brake system in which the brakes are set b reduction o f thetrain .pipe pressure. With such apparatus pressureis normally maintainedon the train pipe.' With the reduction of pressure on the train pipe,eachA apparatus automatically permits the exhaust of air from it, thussetting the brakes. Where this exhaust of air is more rapid than normal,the emergenc brakesl are set', and where this occurs with t e train4under full-speed, especially long freight trains, the train oftendoubles up, thus causing eat injury to the i. With my construction,while the brakes are vset withv the rupture of the outer hose, the escae of air is controlled by ,the size of the pe orations 13 which are ofsuch size. as to allow any esualin volume to thenormal or settin thebrakes.y Thus; whi e the setting Vof t e brakes isaccomplished, theusetting of the emergency brakes 1s' prevented.

What I claim as new is: v

The combination of an air brake system having a train line with airnormally under pressure and arranved 4to apply the brakes with a`reduction 4o 4such pressure; an air brake hose comprising an outer andan inner hose, the inner hosecarrying the train air and the outer hoseforming-a closure aroun the inner hose; and a connection for carryingthe train air to the space between the hose, said connection being ofsmall enough my hand the presence of two'subscribing Y capacity torevent the passage of suiclent wltnesses.

air to set t e emer enc brake u on the lll bursting of said oute hosye,and of sliiiiicient CHARLESmkT' DRIGGS' 5 capacity to accomplish thesetting of the Witnesses;

brakes upon the bursting of said outer ho'se. GUS M, DRIGGS,

In testimony whereof, 1 have hereunto set 1 CARLTON Dames.

It is hereby certified that in Letters Patent No. 964,004, :granted July12, 1910, upon the application of Charles T. Driggs, of Ei'ie,Pennsylvania, for an improvement in Air-Brake Hose, an error appears inthe printed specificationrequiriug correction as follows: Page 1, lines71 and 73 should be transposed; and that theA said Letters Patent shouldbe read with this correction therein that the same Letters Patent No.964,004.

may conform to the record ofthe case in the Patent Oiiice.

Signed andsealed this 16th` day of August, A. D., 1910.

ion in [SEAL] y F. A. TENNANT,

' Acting Commissioner of Patents.

hose, said connection being of small enough my hand the presence oftwo'subscribing Y capacity to revent the passage of suiclent wltnesses.

air to set t e emer enc brake u on the lll bursting of said oute hosye,and of sliiiiicient CHARLESmkT' DRIGGS' 5 capacity to accomplish thesetting of the Witnesses;

brakes upon the bursting of said outer ho'se. GUS M, DRIGGS,

In testimony whereof, 1 have hereunto set 1 CARLTON Dames.

It is hereby certified that in Letters Patent No. 964,004, :granted July12, 1910, upon the application of Charles T. Driggs, of Ei'ie,Pennsylvania, for an improvement in Air-Brake Hose, an error appears inthe printed specificationrequiriug correction as follows: Page 1, lines71 and 73 should be transposed; and that theA said Letters Patent shouldbe read with this correction therein that the same Letters Patent No.964,004.

may conform to the record ofthe case in the Patent Oiiice.

Signed andsealed this 16th` day of August, A. D., 1910.

ion in [SEAL] y F. A. TENNANT,

' Acting Commissioner of Patents.

It is hereby certified that in Letters Patent No. 964,004, granted July12, 1910, upon the application of Charles T. Driggs, of Elie,Pennsylvania, for an improvement in Air-Brake Hose, an error appears inthe printed specification requiring correction as follows: Page 1, lines71 and 73 should be transposed; and that the said Letters Patent shouldbe read with this correction therein that the same may conform to therecord qfthe case in the Patent Office.

Signed and sealed this 16thM day of August, A. D., 1910.

[SEAL] F. A. TENNANT,

Acting Commz'sioner of Patents.

